Half of the Paris attackers were known about by US intelligence, officials have revealed.

Their names were recorded on the central counter-terrorism database TIDE months before last Friday's coordinated attacks on the European capital, which killed 129 people.

At least one of the terrorist squad also had his name on a selective 'no fly list', it was said.

Up to nine attackers are said to have been involved in the massacre including Ahmad Almohammad, 25, Bilal Hadfi, 20, Ibrahim Abdeslam, 31, Omar Ismaël Mostefai, 29, and Samy Amimour, 28. Seven died in the attacks.

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Aware: Half of the Paris attackers were familiar to U.S. intelligence, officials have revealed. Ahmad Almohammad (left) and Bilal Hadfi (right) were two of the men involved, but it is not known if they were on the list

French police are still hunting Salah Abdeslam, who has been on the run since last Friday and is said to be in disguise and using a new name, Yassine Baghli.

A paper issued by National Counter-terrorism Center last year reported that as of December 2013, TIDE contained 'around 1.1 million persons' including 'multiple minor spelling variations of their names'.

The Terrorist Identities Datamart Environment (TIDE) is the U.S. Government's central database on known or suspected international terrorists, and contains highly-classified information provided by members of the Intelligence Community.

U.S. spy and law enforcement agencies 'nominate' names for TIDE, one of the officials said.